Molding-machine



' I 2 SheetsSheet I.

F. G. JOHNSON. MOLDING MACHINE;

' Pttented May 10, I887.

2 Sheets-Sheet 2.

MMoaeLj 4 P. G. JOHNSON. MOLDING MACHINE;

atented May 10, 1887.

Jfiuem 457% a 75W fw N PETERS. Phnloilhographor. wahingiam n.0,

UNITED STATES PATENT OFFICE.

FRANK e. JOHNsON, OF CHICAGO, ILLINOIS.

. MOLDING} MACHINE.-

SPECIFICATION forming part of Letters Patent No. 362,513, dated May 10, 1887.

Application filed June 8, 1886.

To all whom it may concern:

Be it known that I, .FRANK G. J oHNsoN, a

citizen of theUnited States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Molding Machines, ofwhich I do declare the following to be a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My present invention has for its object to provide an improved machine for forming moldings with Waves or similar irregularities in the direetionof their length; and to this end my invention consists in various novel fea tures of construction, hereinafter described, illustrated in the accompanying drawings, and

particularly defined in the claims at the end of this specification.

Figure 1 'is a plan View of my improved molding-machine. Fig. 2 is a view in vertical longitudinal section upon line 00 x of Fig. 1. Fig. 3 is a view in vertical transverse section upon line yy of Fig. 1. Fig. 4 is a viewin side elevation. Fig. 5 is a view in front end elevation. Fig. 6 is a detail view in vertical section of the feed-table and the adjusting feedblock above the same.

A designates the main frame of the machine, in the front of which is journaled the main shaft A, that is provided at one of its ends with the usual fast and loose pulleys, a and a. .Upon the shaft A is also keyed the belt-pul ley B, from which leads the belt B, that passes over the small pulley C of the spindle 0, upon the Outer end of which is carried the cutterhead 0, of suitable construction.

The spindle O of the cutter-head is journaled within'suitable boxes, 0, of the journalbearing frame D, the rear arms, d and d, of this frame being pivotally held upon the rod D in such manner as to permit the journalbearing a of the spindle O to be reciprocated in vertical direction, in a manner to be presently explained. From the arm (1 of the journal-bearing frame D extends the counterbalance-rod E, upon which is held the counterbalance-weight E, the position of this weight upon the bar beingdetermined by means of the set-screw 6.

My purpose in mounting the spindle O of Serial No. 204,454. (No model.)

the cutter-head in vertically reciprocating bearings is to permit the cutter-head to rise and fall as the molding is passing beneath the saine, in order that the knives of such cutterhead may cut into the surface of the molding at greater or less depth, in order to give to such surface an irregularor wavy appearance. The rod E and its weight E, being connected to the journal-bearing frame D beyond its pivotal point, serve to. counterbalance the weight of such frame and of the cutter-head and its spindle, and thus lessen the power necessary to impart to the cutter-head its vertically-reciprocating movement.

. To the forward arm, d of the frame D is.

pivotally connected, as at (1 what I designate the lifting-rod F, the lower end of this rod being held in a manner free to slide by the bracket or plate A projecting in from the side of the main frame. Upon the lifting-rod F is fitted the sleeve or hub g of the arm G, the end of which arm is provided with afinger, 9, that enters the cam-shaped groove. h of the cam-wheel II, that is j ournaled upon the spindle H and is driven by the belt I, that passes Over the pulley t, mounted upon the shaft '1 and driven by the belt T from the pulley 1) upon the shaft A. The arm G .is held in proper position upon the lifting-rod F by means of set-screws which permit the arm to be shifted upon the rod when a cam-wheel of different character is employed to vary the style of irregular surface to be given to the molding, or when the height of the feed table is changed.

From the side extended a stud or journal-pin, a, upon which is pivotally hung a belttightener bar, K, having at one end the pulley 7c, bearing against the belt I, and at its opposite end a weight, 7c, which serves to retain such pulley constantly against the belt. The weight k is held on the bar K by means of the spring 70 so that the position of the weight can be readily varied to promptly maintain the tension of the belt.

Between the vertical bars A of one side of the main frame is fitted the sliding block L, in which is formed a threaded perforation to receive a correspondingly-threaded adjusting of the main frame A there height of the sliding block with respect thereto. In this block L is also formed a journal-bearing for the spindle H,on the outer end of which spindle is carried the feed-wheel N, the teeth a of which project slightly through the top of the feed-table O, that is bolted to the side of the sliding block L, and is elevated and lowered therewith by means of the adjusting-screw M.

From the top of the main frame A rises the bracket A, the overhanging portion a of which is provided with a threaded perforation to receive the adjusting-screw P, that carries at its end the prcsscr-block R, to the lower face of which will be connected a bearingblock, R, having its lower face conformedto fit within the irregularities of the molding upon which the cutter-head is to act. To the rear portion of the main frame will be attached a presser-spring, S, that will bear upon the molding as it passes from beneath the cutterhead; or, if desired, several springs may be employed for this purpose. The rear end of this spring S is connected to the short rod or shaft S, held within a suitable seat or socket in the side of the main frame, the position of the rod being determined by the set-screw 8, to regulate the force of the spring S. By placing the cam-wheel H and the feed-wheel N upon the same spindle H and connecting the bearing of this spindle with the feed-table 0, not only is the construction of the machine much simplified, but I am thereby enabled, also, at one operation, to adjust the feed wheel and table in unison to accommodate moldings of different degrees of thickness.

Fromthe foregoingdescription of: parts the operation of'my improved machine will be seen mm as follows: The molding, to lL-llBSlll'-- face of which a wavy or irregular contour is to be given, is placed upon the feed-table O t and beneath thepresser-bloek It,aml is forced into the'bite of the feed-rollN. i Bythis feedroll'itis carried beneath the cutter-head, the i5 knives of which, by reason of their verticallyreciprocating movement, cut into irregular *shape the surfaceof the molding as it is fed set o'ut the preferred cmbodimentof my: in-t z 2 through the: machine, as: seen in edottcdlines of Fig. 4. ii Vhile in the foregoing description I have vent-ion, it will be understood that the details without departing from the spirit of my in- I'am well aware that machines have hereto fore been devised for forming rustic moldings, in which there was imparted to the cutter-head an up-and-down movement relative to the molding as it passed through the machine. In. such machine, however, the spindle of the cutter-head was mounted in separate vertically-sliding bearings, the reciprocating movement of which was eil'ected by means of a cam having an irregular periphery. To such construction, therefore, I do not wish to be understood as making any claim.

Having thus described my inventiomwhat I claim as new, and desire to secure by Letters Patent, is

1. In a molding-machine, the combination, with the rotary cutter-head and a horizontal spindle for said cutter-head, of a verticallyswinging journalbearing frame wherein said spindle is mounted, a liftingrod for vertically swinging said frame, and a cam-wheel and an arm for imparting movement to said lifting rod, substantially as described.

2. In a molding-machine, the combination, with the rotary cutter-head, of a horizontal spindle forsaid cutter-head, a vertically-swing ing journalbearing frame, D, wherein said spindle is mounted, a lifting-rod, F, for imparting swinging movement to said frame, a cam-wheel, H, having a groove in the side thereof, and an arm, G, connected to the lifting-rod and engaging with the cam-wheel, sub stantially as described.

3. In a molding-machine, the combination, with the rotary cutter-head and its spindle, of the swinging journal-bearing frame D, the counterbalance-rod E and weight E, the lifting-rod F, the arm G, and the cam-wheel Il, substantially as described.

4. In a molding-machine, the combination,

with the cutter-head and its spindlc, oi' the vertically-movable journal-bearings for said spindle, the lifting-rod F, the adjustable arm G, the eainwheel Hand feed-roll:N,and a vertically-movable spindlefor said eanrwhccl and feed-roll, substantially as described.-

' '5. In a molding-machine, the combination,

with thecnttenhead and its spindle, of vertically-movable journal-bearings for said spindie, a camewheel in connection with saidbear- I rings for imparting movement thereto, a feedwheel and vertically-movable table, and a bearing for thespindle of the feed-wheel and acam-wheel movable inunison with the feedtable, substantially as described.

6. Ina molding-machine, the combination,

the spindle I-I, and the vertically-adjustable feed-table and bearing forthespindle l-I, substantially as described.

' FRANK G. J OHNSON. Witnesses:

Geo. I. FISHER, Jr., J AMES H. PEIRCE.

IOOm. 

